US4453662A - Solder handling - Google Patents

Solder handling Download PDF

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Publication number
US4453662A
US4453662A US06/347,532 US34753282A US4453662A US 4453662 A US4453662 A US 4453662A US 34753282 A US34753282 A US 34753282A US 4453662 A US4453662 A US 4453662A
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US
United States
Prior art keywords
solder
base metal
product
solder wire
wire
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/347,532
Inventor
II Robert J. Russell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TECHNICAL MATERIALS Inc A CORP OF RI
Technical Materials Inc
Original Assignee
Technical Materials Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Technical Materials Inc filed Critical Technical Materials Inc
Priority to US06/347,532 priority Critical patent/US4453662A/en
Assigned to TECHNICAL MATERIALS, INC., A CORP OF R.I. reassignment TECHNICAL MATERIALS, INC., A CORP OF R.I. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: RUSSELL, ROBERT J., II
Application granted granted Critical
Publication of US4453662A publication Critical patent/US4453662A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/06—Fusible members characterised by the fusible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
    • B23K35/0227—Rods, wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H2011/0087—Welding switch parts by use of a laser beam
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
    • H05K3/3457—Solder materials or compositions; Methods of application thereof
    • H05K3/3478—Applying solder preforms; Transferring prefabricated solder patterns

Definitions

  • the invention relates to handling solder.
  • solder wire attached to a base metal It is known in the art to provide solder wire attached to a base metal.
  • solder preforms have been made by attaching pieces of solder to parts in preparation for soldering the parts to something else.
  • electrical fuses have been made by melting and recasting solder on a base metal electrical conductor; in use heat from excessive current through the base metal causes the solder to melt and break a circuit.
  • solder wire can be precisely and reliably attached to a base metal by melting a small quantity of solder at the solder wire-base metal juncture along the length of the solder wire using a radiant energy beam focused at the juncture. In preferred embodiments less than 20% of the solder wire is melted; the base metal and the wire are continuously moved in relation to the source of the beam; the relative movement is at about 10 feet per minute, and the radiant energy beam contains about 40 watts of power; and the base metal is a copper alloy, and the solder wire is resin core solder wire with a diameter of about 0.025 inch.
  • the invention features a solder-base metal product in which solder wire is attached to the base metal along its length at the solder-base metal juncture by a small portion of melted solder.
  • the product is a solder preform, and in some other preferred embodiments the product is an electrical fuse.
  • FIG. 1 is a perspective view of a preferred embodiment of the invention.
  • FIG. 2 is a diagrammatic vertical sectional view of the preferred embodiment of the invention.
  • solder wire 12 60 Sn 40 Pb, approximately 0.025 inch in diameter, having a #65 core, and available under the trade designation Kester 44 attached along its length to base metal 10 (0.010 inch thick C72500 copper alloy.)
  • solder wire 12 attaches solder wire 12 to base metal 10.
  • Portion 14 comprises less than 20% of solder wire 12, and core 16 of solder wire 12 remains intact.
  • Solder wire 12 is held against base metal 10 in a desired position by a fixture (not shown) and is attached continuously along its length to base metal 10 by focusing a radiant energy beam from a laser (Coherent Everlase 525 laser of Laser, Inc.) at the juncture between wire 12 and base metal 10 so that only a small amount, portion 14, of solder wire 12 melts.
  • Base metal 10 and solder wire 12 are moved in relation to the source of radiant energy at approximately 10 feet per minute, and approximately 40 watts power is required to achieve the proper melting (i.e., melting of a small amount, e.g., less than 20% of the total volume of wire 12).
  • the solder wire attached to the base metal can be used or wound into a continuous coil for storage or shipping to a customer for unwinding and use.
  • the base metal and attached solder wire can be stamped into a desired shape of a preform; the solder is properly located and ready for soldering, thereby simplifying soldering procedure.
  • the base metal and attached solder wire can also be cut and used to manufacture electrical fuses.

Abstract

Solder wire attached along its length to a base metal by a small quantity of solder melted at the solder-base metal juncture.

Description

FIELD OF THE INVENTION
The invention relates to handling solder.
BACKGROUND OF THE INVENTION
It is known in the art to provide solder wire attached to a base metal. For example, solder preforms have been made by attaching pieces of solder to parts in preparation for soldering the parts to something else. Also, electrical fuses have been made by melting and recasting solder on a base metal electrical conductor; in use heat from excessive current through the base metal causes the solder to melt and break a circuit.
SUMMARY OF THE INVENTION
I have discovered that solder wire can be precisely and reliably attached to a base metal by melting a small quantity of solder at the solder wire-base metal juncture along the length of the solder wire using a radiant energy beam focused at the juncture. In preferred embodiments less than 20% of the solder wire is melted; the base metal and the wire are continuously moved in relation to the source of the beam; the relative movement is at about 10 feet per minute, and the radiant energy beam contains about 40 watts of power; and the base metal is a copper alloy, and the solder wire is resin core solder wire with a diameter of about 0.025 inch.
In another aspect the invention features a solder-base metal product in which solder wire is attached to the base metal along its length at the solder-base metal juncture by a small portion of melted solder. In some preferred embodiments the product is a solder preform, and in some other preferred embodiments the product is an electrical fuse.
DESCRIPTION OF THE PREFERRED EMBODIMENT
I turn now to description of the structure, manufacture, and use of the presently preferred embodiment of the invention, after first briefly describing the drawings.
DRAWINGS
FIG. 1 is a perspective view of a preferred embodiment of the invention.
FIG. 2 is a diagrammatic vertical sectional view of the preferred embodiment of the invention.
STRUCTURE
Referring to FIGS. 1 and 2, there is shown solder wire 12 (60 Sn 40 Pb, approximately 0.025 inch in diameter, having a #65 core, and available under the trade designation Kester 44) attached along its length to base metal 10 (0.010 inch thick C72500 copper alloy.)
Referring to FIG. 2, it is seen that melted portion 14 of solder wire 12 attaches solder wire 12 to base metal 10. Portion 14 comprises less than 20% of solder wire 12, and core 16 of solder wire 12 remains intact.
MANUFACTURE
Solder wire 12 is held against base metal 10 in a desired position by a fixture (not shown) and is attached continuously along its length to base metal 10 by focusing a radiant energy beam from a laser (Coherent Everlase 525 laser of Laser, Inc.) at the juncture between wire 12 and base metal 10 so that only a small amount, portion 14, of solder wire 12 melts. Base metal 10 and solder wire 12 are moved in relation to the source of radiant energy at approximately 10 feet per minute, and approximately 40 watts power is required to achieve the proper melting (i.e., melting of a small amount, e.g., less than 20% of the total volume of wire 12).
The solder wire attached to the base metal can be used or wound into a continuous coil for storage or shipping to a customer for unwinding and use.
Use
The base metal and attached solder wire can be stamped into a desired shape of a preform; the solder is properly located and ready for soldering, thereby simplifying soldering procedure. The base metal and attached solder wire can also be cut and used to manufacture electrical fuses.
Other Embodiments
Other embodiments of the invention will become apparent to those skilled in the art. For example, other base metals of different shapes and other solders can be used.

Claims (6)

What is claimed is:
1. A solder-base metal product comprising
a base metal, and
solder wire continuously attached to said base metal along its length at the solder-base metal juncture by a small portion of melted solder.
2. The product of claim 1 wherein less than 20% of said solder is melted.
3. The product of claim 2 wherein said solder is resin core solder about 0.025 inch in diameter.
4. The product of claim 3 wherein said base metal is copper alloy.
5. The product of claim 1 wherein said product is a solder preform.
6. The product of claim 1 wherein said product is an electrical fuse.
US06/347,532 1982-02-10 1982-02-10 Solder handling Expired - Fee Related US4453662A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US06/347,532 US4453662A (en) 1982-02-10 1982-02-10 Solder handling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/347,532 US4453662A (en) 1982-02-10 1982-02-10 Solder handling

Publications (1)

Publication Number Publication Date
US4453662A true US4453662A (en) 1984-06-12

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US06/347,532 Expired - Fee Related US4453662A (en) 1982-02-10 1982-02-10 Solder handling

Country Status (1)

Country Link
US (1) US4453662A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6168070B1 (en) * 1998-10-14 2001-01-02 Visteon Global Technologies, Inc. Method for soldering DPAK-type electronic components to circuit boards
US20210402525A1 (en) * 2020-06-30 2021-12-30 Electronics And Telecommunications Research Institute Wire for electric bonding

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US695462A (en) * 1900-12-07 1902-03-18 John Lee Can-body blank.
US2151206A (en) * 1936-01-14 1939-03-21 Geophysical Res Corp Drill stem section
US3610874A (en) * 1969-11-21 1971-10-05 Western Electric Co Laser welding technique
US4232814A (en) * 1979-06-14 1980-11-11 Semi-Alloys, Inc. Method and apparatus for fabricating a sealing cover unit for a container for a semiconductor device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US695462A (en) * 1900-12-07 1902-03-18 John Lee Can-body blank.
US2151206A (en) * 1936-01-14 1939-03-21 Geophysical Res Corp Drill stem section
US3610874A (en) * 1969-11-21 1971-10-05 Western Electric Co Laser welding technique
US4232814A (en) * 1979-06-14 1980-11-11 Semi-Alloys, Inc. Method and apparatus for fabricating a sealing cover unit for a container for a semiconductor device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6168070B1 (en) * 1998-10-14 2001-01-02 Visteon Global Technologies, Inc. Method for soldering DPAK-type electronic components to circuit boards
US20210402525A1 (en) * 2020-06-30 2021-12-30 Electronics And Telecommunications Research Institute Wire for electric bonding
US11618109B2 (en) * 2020-06-30 2023-04-04 Electronics And Telecommunications Research Institute Wire for electric bonding

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Legal Events

Date Code Title Description
AS Assignment

Owner name: TECHNICAL MATERIALS, INC. LINCOLN, RI. A CORP OF R

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:RUSSELL, ROBERT J., II;REEL/FRAME:003977/0135

Effective date: 19820202

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 19880612